测绘行业的前方交会程序，可以简单绘图，但是只在缓存中，没实现图形的保存。-Surveying and mapping industry forward intersection program, you can simply drawing, but only in the cache, did not realize graphics saved.

Software introduction ... Baidu know custom classification collection version is developed using PHP Baidu know Q & A collection website source. Software characteristic: 1, can be customized collection classification 2, free manual input